Question

what are the main biofuels in used today and how are they made

Answer 1

Biofuels are made mostly from plants that have just been harvested.
There are three main types of biofuel
Ethanol, biodiesel, and biojet fuel.Ethanol is used in engines that burngasoline, like most cars.

hope it may help u

Answer 2

Whereas first generation biofuels are made from the sugars and vegetable oils found in arable crops, second generation biofuels are made from lignocellulosic biomass or woody crops, agricultural residues or waste plant material (from food crops that have already fulfilled their food purpose).The feedstock used to generate second-generation biofuels thus either grows on arable lands, but are just byproducts of the actual harvest (main crop) or they are grown on lands which cannot be used to effectively grow food crops and in some cases neither extra water or fertilizer is applied to them. Non-human food second generation feedstock sources include grasses, jatropha and other seed crops, waste vegetable oil, municipal solid waste and so forth.

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